Distortion in Loudspeakers

Nonlinear distortion is a problem which plagues all speakers. This particular type of distortion is a common problem in subwoofers, which must move large amounts of air to produce adequate levels of deep bass. Nonlinear distortion is defined as any form of distortion that moves energy from one portion of the audio frequency spectrum to another. When a single tone is applied to a nonlinear system, the result is harmonic distortion. In which some of the energy leaves the system at multiples of the original frequency. When multiple tones are applied, intermodulation tones are produced, usually as simple combinations of the input frequencies. Generally, 3% distortion is considered a reasonable amount for speakers. This means that 3% ofthetotalenergyleavingthespeakerisatfrequenciesotherthantheintendedinput signal.

Most subwoofers on the market today however, produce much more than 3% distortionatcommonlisteninglevels.Manymodelswehavetestedproducegreater than 20% distortion @ 20Hz when driven to 100dB. This is a typical output level obtained in many systems, particularly home theater systems. Even at 1 watt, many conventional units produce several percent distortion. Secondly, the odd order, higher harmonics are much more offensive to the human ear than the closer 2nd harmonic.

An interesting result of this reduced distortion is that some of the bass, when played over an extremely accurate subwoofer system, seems to actually be missing. The truth, however, is that the "missing" bass was never there to begin with! Distortion products of conventional woofers actually add to the bass spectrum making it appear louder than recorded. This is due to the additional and unwanted harmonics (distortion) of the fundamental signal. While conventional subwoofers offer little to combat distortion products, we at Velodyne have developed another way. . .

The Velodyne Servo-Control Solution

YourVelodyneHGSXsubwooferproducessoundinthesamemannerasconventional loudspeakers: a cone-shaped piston is forced to move by means of a linear motor. However, this is about the only conventional part of the subwoofer.

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Velodyne Acoustics HGS-15X THX owner manual Distortion in Loudspeakers, Velodyne Servo-Control Solution
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HGS-15X THX specifications

The Velodyne Acoustics HGS-15X THX is a high-performance subwoofer renowned for its powerful bass response and advanced technology. Designed for home theater enthusiasts and audiophiles alike, the HGS-15X delivers an extraordinary audio experience that brings films, music, and games to life.

At the heart of the HGS-15X is a 15-inch long-throw driver, which is powered by an impressive 1,250 watts of continuous power and peaks up to 3,000 watts. This combination enables the subwoofer to produce deep, rich bass with astonishing clarity, ensuring that every rumble, explosion, or musical note is felt as much as it is heard. The driver’s heavy-duty construction and advanced materials enhance durability and performance, making it suitable for even the most demanding audio environments.

One of the standout features of the HGS-15X is its state-of-the-art Digital Signal Processing (DSP) technology. This advanced processing capability allows for precise tuning of the audio output, ensuring that the subwoofer behaves optimally across a wide range of frequencies. With DSP, users can expect minimal distortion and a smooth frequency response, which is crucial for creating a well-balanced listening experience.

Another significant characteristic of the HGS-15X is its room EQ technology, known as the "Auto EQ" system. This feature analyzes the acoustic properties of the room and adjusts the subwoofer's output accordingly, providing the best possible performance in any environment. The result is enhanced bass performance that seamlessly integrates with other audio components in the system.

The HGS-15X also offers versatile connectivity options. It includes both RCA line-level inputs and speaker-level inputs, allowing for easy integration with a variety of audio systems. Additionally, it features a phase control switch and adjustable crossover settings, providing users with the flexibility to customize their sound settings according to their preferences.

The build quality of the HGS-15X is another highlight, featuring a robust cabinet designed to minimize vibration and resonance. Finished with a sleek, modern aesthetic, it not only complements any home décor but also ensures durability.

In conclusion, the Velodyne Acoustics HGS-15X THX subwoofer is an exceptional choice for those seeking a powerful and immersive audio experience. With its advanced technologies, high-quality construction, and user-friendly features, it stands out as a top-tier option for home theater setups and audio systems, delivering remarkable bass performance that elevates any listening experience.
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